R.C.A.M. VanderVorst

Homotopy Classes for Stable Periodic and Chaotic¶Patterns in Fourth-Order Hamiltonian Systems

J. Kwapisz, W. Kalies, J. Kwapisz, 2000 .

Homotopy Classes for Stable Connections between Hamiltonian Saddle-Focus Equilibria

J. Kwapisz, W. D. Kalies, W. Kalies, 1998 .